uses crt;
var a : array[1 .. 100] of integer;
i, n, s : integer;
begin
clrscr;
write('Nhap so phan tu : '); readln(n);
s := 0; write('Nhap ', n ,' phan tu : ');
for i := 1 to n do begin
read(a[i]); s := s + a[i]; end;
writeln('Tong phan tu : ', s);
writeln('Trung binh phan tu : ', s / n : 2 : 2);
readln
end.